Transmission-gear.



PATENTED APR. 2, 1907. A. E. PHELON.

TRANSMISSION GEAR. APPLICATION IILBD APR.30,1906.

2 SHEETS-SHEET l.

No. 848,766. S PATENTED APR. 2, 1907.

A. E. PHELON.

TRANSMISSION GEAR.

APPLICATION IILED APR.30,1906.

2 SHEETS-SHEET 2.

UN TED STATES AT NT, OFFICE.

AETIIU E. PHELON, F SPRINGFIELD, MASSACHUSETTS.

TRANSMISSION-GEAR.

Specification of Letters Patent.

Patented April 2, 1907.

I Application filed April 3f), 1906. Serial No. 314,343.

Too/ll whom it may concern:

Be it'known that I, ARTHUR E. PHEL N, citizen of the United States of America, residing at Springfield, in the'county of Hampden and State of Massachusetts, have invented new and useful Improvements in Transmission-Gears, of which the following is a specification.

This inventlon relates to, variable-speed transmission mechanism, the object thereof being to provide an improved construction of that class of these mechanismsin which Fig. 2 is a cross-sectional view on line 2 2,

Fig. 1, looking in the direction of the arrow, showing the relation of the gears on the two shafts of the transmission device'in this plane and the relation of one of the clutches to one gear f, having a relatively long hub g, onthe' of the gears on said shaft. 'f Fig. 3 is a similar view in' the plane of line 3 3, Fig. 1 looking.

in the direct on of the arrow, this view show,- ing more clearly the relation of the intermediate reversing-gear to the two shafts of the transmission mechanism.

Referring now to the drawings, a represents a casing which in'eloses the transmission mechanism, in the op osite walls of which the shaft 6 has a bearlng at each end. This is practically the counter-shaft. Parallel with this shaft the sleeve 0- also has, .a

bearing in the casing, a part d of this sleeve constituting a housing for the differehtial' gear. This is of a well-known design-and will be briefly described farther on. In the sleeve 0 is located the two-part driven shaft 6. In the drawings this is re resented as a sprocket-shaft ofa self-propel ed chain-driven vehicle. i

Mounted loosely on the sleeve 0 is the bevelend of which is cut a gear h. This bevelgearf is alwa s in mesh with the bevel-gear k on the end 0 the driving-shaft m which enters the casing at right angles to the driven shaft. That part of the sleeveon which the gear f is mounted is. of somewhat larger diameter than that immediately at the lefthand side thereof in Fig; 1, said last-named portion of the shaft being channeled, as shown in Fig. 2,;to receive the hub of a sliding gear 0, whichis movable on this portion of the shaft by means of a fork p, actuated by a sliding rod 1';

On the shaft 1) two gears of different diameters are secured, one of them, 8, in position. to be engaged by the gear 0 and the other, 1., being constantlyin mesh with the gear h on the hub of the beveled gear f. It follows, therefore, that as the latter is constantly rotated by its connection with the drivingshaft it will impart constant motion to the shaft 6 through the gear t, and therefore.

when the gear 0 is slid along to the left into mesh with thegear s the sleeve 0 will be rotated and the s 'eed of its rotation will be in proportion to t e relative diameters of the gears through which rotative motion. is imparted thereto-thatis, the gear h driving onto the gear t and the gear 8 meshing with the gear 0. This gives the second speed in advance. I

On that end of the gear o-contiguous to thegear h an internal gear .0 iseut to mesh with said ear h, and if-the gear 0, actuated by its clutc -lever, is slid to the right into mesh with this gear. it looks the gear f to the sleeve 0, which gives a direct drive In advance at the highest speed, the rotation of .the driven shafte in either case taking place through .the' differential gears, as follows: The driven shaft .e is a two-piece shaft, the contiguous ends thereof being, as usual, within the dif ferential gear-case, these ends being squared,

as at 'w, to receive the hubs of oppositelyfacing beveled gears x. Onopposite ends of the stud-shaft passing through thecasing, are two bevele pinions3, each engaging the construction being a well-known type of differential gear constitutes no part of the invention except as used in combination with other novel features. 'When, therefore, the sleeve 0 is rotated, the two parts of the driven shaft e will through this differential gear rotate as one shaft.

On the 'gear-caslng is bolted or otherwise secured the gear 4, which is constantly in mesh with a gear 5, rotatably mounted on a fshort shaft 6, (see Fig. 3,) which is located back of and parallel with the shaft 1). On

beveled gears :13 in the usual manner. This this same shaft 6 is fixed a larger gear 7 with v which a sliding gear 8 on the shaft 6 may en- This last-named gear is actuated by a e. fdfi: 9 and has a spline and groove or'other slidable and rotative connection with the shaft b.

To attain the lowest or third speed in advance for the driven shaft 6, the gear 8 is thrown to the right of its position shown in Fig. 1 directly into mesh with the gear 4. To attain the reverse speed, which also always is a relatively slow speed, the gear 8 is thrown to the left of its position shown in Fig. 1 into mesh with gear 7,, which thereupon acts as an intermediate between the gear Sand the gear 5,-Which drives the "sleeve c," and therefore the latter will-berotated in a direction reverse to that which is attained by slidingthe gear 8 directly into mesh with the gear :4 on said sleeve.

. Having thus described my invention, what I claim, and desire to secure'byLetters Patent of the United States, is

1. A variable-speed mechanism comprising a rotatable sleeve suitably supported, a portion of which-constitutes a differentialgear case, a counter-shaft,.a sliding gear the sliding gear on the sleeve may engage to rotate the sleeve by direct drive, and an intermediate gear between the sliding gear on the counter-sl'iaft and the fixed gear on the sleeve whereby the latter may he reversely rotated by the engagement of the sliding gear with said intermediate.

2 A variable-speed mechanism comprising an inclosing casing, a sleeve rotatably mounted therein, a portion of which constitutes a 'difierential gear case, differentiah gear mechanism in the latter, and a two-part driven shaft in the sleeve operatively connected to the differential; a counter-shaft rotatably mounted in the casing parallel with the said sleeve, a loose gear on the latter, and a fixed gear on the counter-shaft with which the loose gear is in mesh, and suitable means to impart constant rotation to the loose gear, a sliding gear on the sleeve'nonrotatable thereon, and a second fixed gear on the counter-shaft, said sliding gear being movable into meshing engagement with the loose gear to rotate the sleeve at one speed or into mesh with said second fixed gear on the counter-shaft to rotate the sleeve at a-differentrate of speed in: the same'direction, a

sliding gear on the counter-shaft, and a gear secured to the sleeve, and means to move this sliding gear intome'sh with the gear fixed to' the sleeve to rotate the latter.

ARTHUR E. PHELON.

Witnesses:

.ISRAEL NEWTON,

F. 1. WILSON. 

